diff --git a/src/detection/users/users_windows.c b/src/detection/users/users_windows.c
index 7ed1c70fa..5c78cfdd7 100644
--- a/src/detection/users/users_windows.c
+++ b/src/detection/users/users_windows.c
@@ -2,7 +2,6 @@
 #include "util/windows/unicode.h"
 
 #include <wtsapi32.h>
-#include "wtsapi32_extend.h"
 
 void ffDetectUsers(FFlist* users, FFstrbuf* error)
 {
diff --git a/src/detection/users/wtsapi32_extend.h b/src/detection/users/wtsapi32_extend.h
deleted file mode 100644
index 5c89beb2f..000000000
--- a/src/detection/users/wtsapi32_extend.h
+++ /dev/null
@@ -1,45 +0,0 @@
-#pragma once
-
-//at the time of writing, <wtsapi32.h> of MinGW doesn't have the definition of WTSEnumerateSessionsExW and friends
-
-#if (_WIN32_WINNT >= 0x0601)
-
-typedef struct _WTS_SESSION_INFO_1A {
-  DWORD ExecEnvId;
-  WTS_CONNECTSTATE_CLASS State;
-  DWORD SessionId;
-  LPSTR pSessionName;
-  LPSTR pHostName;
-  LPSTR pUserName;
-  LPSTR pDomainName;
-  LPSTR pFarmName;
-} WTS_SESSION_INFO_1A, *PWTS_SESSION_INFO_1A;
-
-typedef struct _WTS_SESSION_INFO_1W {
-  DWORD ExecEnvId;
-  WTS_CONNECTSTATE_CLASS State;
-  DWORD SessionId;
-  LPWSTR pSessionName;
-  LPWSTR pHostName;
-  LPWSTR pUserName;
-  LPWSTR pDomainName;
-  LPWSTR pFarmName;
-} WTS_SESSION_INFO_1W, * PWTS_SESSION_INFO_1W;
-
-#define WTS_SESSION_INFO_1 __MINGW_NAME_AW(WTS_SESSION_INFO_1)
-#define PWTS_SESSION_INFO_1 __MINGW_NAME_AW(PWTS_SESSION_INFO_1)
-
-WINBOOL WINAPI WTSEnumerateSessionsExA(HANDLE hServer,DWORD* pLevel,DWORD Filter,PWTS_SESSION_INFO_1A* ppSessionInfo,DWORD* pCount);
-WINBOOL WINAPI WTSEnumerateSessionsExW(HANDLE hServer,DWORD* pLevel,DWORD Filter,PWTS_SESSION_INFO_1W* ppSessionInfo,DWORD* pCount);
-#define WTSEnumerateSessionsEx __MINGW_NAME_AW(WTSEnumerateSessionsEx)
-
-typedef enum _WTS_TYPE_CLASS {
-  WTSTypeProcessInfoLevel0,
-  WTSTypeProcessInfoLevel1,
-  WTSTypeSessionInfoLevel1
-} WTS_TYPE_CLASS;
-BOOL WTSFreeMemoryExA(WTS_TYPE_CLASS WTSTypeClass,PVOID pMemory,ULONG NumberOfEntries);
-BOOL WTSFreeMemoryExW(WTS_TYPE_CLASS WTSTypeClass,PVOID pMemory,ULONG NumberOfEntries);
-#define WTSFreeMemoryEx __MINGW_NAME_AW(WTSFreeMemoryEx)
-
-#endif /*(_WIN32_WINNT >= 0x0601)*/